Pulverizing apparatus



' v 3Sheets-Shee't 1. R. G. FAIRBANKS 817 D. E. BREINIG'.- I

Pulvrizi ng Apparatus.

No. 2 7,970- Patented May 25, 1880.

r Z I J v E m/ 4 IN'YEI TTORIS'Q WITNESSES:

ATTORNEY,

N-FETERS, PHDTO-UTMOGRAPHER, WASHINGTON D C 3 sheets sh eet 2. R. G.FAIRBANKS 81; D. E. BREINIG.

Pulverizing Apparatus. No. 227,970. Patented May/ 25,1880.

AWZM 29. @MW' fimfifinw $5 a INVENTCRS. I

ATTORNEY sweets-sheets.

RYG FAIRBANKS 8v D. E. BREINIG,

Pulverizing Apparatus. No. 227,970. Patented May 25, I880.

ATTORNEY N. PETERS, PHDTO-LFFHOGRAPHBK, WASHINGTON. D. C,

UNITED STATES PATENT OFFICE.

REUBEN G. FAIRBANKS, OF FORT ANN, AND DAVID E. BREINIG, OF BROOK- LYN,NEW YORK, ASSIGNORS TO THE BRIDGEPORT WOOD FINISHING COMPANY, OFBRIDGEPORT, CONNECTICUT. 4

P ULVER|ZING APlARATUS.

SPECIFICATION forming part of Letters Patent No. 227,970, dated May 25,1880.

Application filed November 21, 1879.

To all whom 1t may concern:

Be it known that we, REUBEN G. FAIR- BANKS, of Fort Ann, Washingtoncounty, and DAVID E. BREINIG, of Brooklyn, Kings 5 county, State of NewYork, have invented a new and useful Improvementin Pulverizing- Mills,which is fully set forth in the following specification and accompanyingdrawings, in which- IO Figure l is a front View of our improved mill,partially in section; Fig. 2, a longitudinal central section thereof;Fig. 3, a front view of the mill with the gearing removed, for thepurpose of driving the mill by a belt, and

- also showing a bolting apparatus for bolting the pulverized material;Fig. 4, an end view of the bolting apparatus; Figs. 5 and 6, (letachedviews thereof.

The object of our invention is to pulverize 2o quartz and other mineralsubstances more perfectly than has heretofore been done in a mill intowhich the material is constantly fed and from which the fine powder isconstantly being delivered. This is accomplished by the devices whichwill be now explained.

A represents the foundation; B, the upright supports; O, t e shaft; D,the roller-bearings; E, the cylinder; F, the lining thereof; G, thehopper; H, the screw -feed; I, the funnel- 0 shaped outlet; J, theseparating-receiver; K,

the bolter; L, the receiving-box; M, the upright bolter-bearing; N, thebolter-shaft; O, the bolt-check and shaft-bearer; P, the blower; Q, theair-pipe; R, the blower-pulley; S, the 3 5 driving-pulley; T, theblower-pulley belt; U,

the feed-screw pulley; V, the feed-screw driving-pulley; WV, thedriving-shaft; X X, the

shaft and cylinder gears; Y, the oylinder-pulley.

The cylinder is lined with glass, Esopus, Arkansas, or Washita stone,and is supplied with a sufficient quantity of broken uncalcined quartzor pebbles in the usual manner, and its rotation is obtained fromdriving-shaft W, either by gears X X or pulley Y, as may be preferred.

The operation of the mill is as follows: The

crushed material, of about sixteen-mesh size, to be pulverized is fedcontinuously into hopper Gr, falling upon feed-screw H, the revolv- 5oing blades of which carry it within the cylinder, where the brokenquartz or pebbles grind it by their violent contact as the cylinder isslowly rotated on shaft 0, bearing on roller D. Blower P, actuated bypulleys R S and belt T, forces through pipe Q a strong blast of airwithin cylinder E, and, as the material gradually becomes sufficientlyfine and light, blows it through funnel I into bolter K, when it strikesagainst boltingcheck O, which so retards it that it falls to the innersurface of the bolter, and thence, through its meshes of various degreesof fineness, if desired, into a receiving-box partitioned to receive theseveral grades as coarser or finer meshes deliver them.

If the separating-receiver J is used in preference to the bolter, theoutcoming powder will be carried by the current of air into the firstdivision. The coarser and heavier particles will fall intothe-receiving-chamber beneath, but the lighter will be carried npandover the first Wall of partition, where, in the diminished current, theheavier particles will, A in' their turn, seek the receptacle beneath,while the lighter will pass up and over the second wall of partition, todrop or pass up and over a third partition, as their weight may be. Thefinal chamber should be closed with muslin to promote the circulation byallowing the air to escape through its pores after its passage throughthe mill and various separating-chamhers.

What we claim, and desire to secure by Letters Patent, 'is- Thecombination of a blower, a funnel-shaped outlet, and a bolter providedwith r a checkpiece, constructed and operating together, substantiallyas and for the purposes set forth.

REUBEN Gr. FAIRBANKS. DAVID E. BREINIG.

Witnesses MYRON PERRY, F. HURD.

